Zero-Drift, Single-Supply, Rail-to-Rail
Input/Output Operational Amplifiers
Data Sheet
AD8551/AD8552/AD8554
FEATURES
PIN CONFIGURATIONS
Low offset voltage: 1 μV
1
8
NC
–IN A
+IN A
V–
NC
V+
OUT A
NC
Input offset drift: 0.005 μV/°C
Rail-to-rail input and output swing
5 V/2.7 V single-supply operation
High gain, CMRR, PSRR: 130 dB
Ultralow input bias current: 20 pA
Low supply current: 700 μA/op amp
Overload recovery time: 50 μs
No external capacitors required
AD8551
4
5
NC = NO CONNECT
Figure 1. 8-Lead MSOP (RM Suffix)
1
2
3
4
8
7
6
5
NC
–IN A
+IN A
V–
NC
V+
AD8551
OUT A
NC
APPLICATIONS
NC = NO CONNECT
Temperature sensors
Pressure sensors
Precision current sensing
Strain gage amplifiers
Medical instrumentation
Thermocouple amplifiers
Figure 2. 8-Lead SOIC (R Suffix)
1
8
OUT A
–IN A
+IN A
V–
V+
OUT B
–IN B
AD8552
4
5
+IN B
Figure 3. 8-Lead TSSOP (RU Suffix)
GENERAL DESCRIPTION
1
2
3
4
8
7
6
5
OUT A
–IN A
+IN A
V–
V+
OUT B
–IN B
+IN B
AD8552
This family of amplifiers has ultralow offset, drift, and bias
current. The AD8551, AD8552, and AD8554 are single, dual,
and quad amplifiers featuring rail-to-rail input and output swings.
All are guaranteed to operate from 2.7 V to 5 V with a single supply.
Figure 4. 8-Lead SOIC (R Suffix)
OUT A
–IN A
+IN A
V+
+IN B
–IN B
1
14
OUT D
–IN D
+IN D
V–
+IN C
–IN C
OUT C
The AD855x family provides the benefits previously found only
in expensive auto-zeroing or chopper-stabilized amplifiers.
Using Analog Devices, Inc. topology, these new zero-drift
amplifiers combine low cost with high accuracy. No external
capacitors are required.
AD8554
OUT B
7
8
Figure 5. 14-Lead TSSOP (RU Suffix)
With an offset voltage of only 1 μV and drift of 0.005 μV/°C, the
AD855x are perfectly suited for applications in which error
sources cannot be tolerated. Temperature, position and pressure
sensors, medical equipment, and strain gage amplifiers benefit
greatly from nearly zero drift over their operating temperature
range. The rail-to-rail input and output swings provided by the
AD855x family make both high-side and low-side sensing easy.
OUT A
1
2
3
4
5
6
7
14 OUT D
13
12
11
10
9
–IN A
+IN A
V+
–IN D
+IN D
V–
AD8554
+IN B
–IN B
OUT B
+IN C
–IN C
OUT C
8
The AD855x family is specified for the extended industrial/auto
motive temperature range (−40°C to +125°C). The AD8551
single amplifier is available in 8-lead MSOP and 8-lead narrow
SOIC packages. The AD8552 dual amplifier is available in 8-lead
narrow SOIC and 8-lead TSSOP surface-mount packages. The
AD8554 quad is available in 14-lead narrow SOIC and 14-lead
TSSOP packages.
Figure 6. 14-Lead SOIC (R Suffix)
Rev. E
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rightsof third parties that may result fromits use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks andregisteredtrademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©1999–2012 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com